/* ===== ROOT VARIABLES ===== */
:root {
  --dart-blue: #0175c2;
  --dart-blue-dark: #02569b;
  --dart-light-blue: #13b9fd;
  --dart-teal: #1de9b6;
  --bg-dark: #0a0e17;
  --bg-gradient: linear-gradient(135deg, #0a0e17 0%, #1a1f35 50%, #0a0e17 100%);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --text-muted: rgba(255, 255, 255, 0.55);
  --shadow-glow: 0 0 45px rgba(1, 117, 194, 0.35);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --accent-purple: #8338ec;
  --accent-pink: #ff006e;
  --neon-cyan: #00f0ff;
  --neon-purple: #bf55ec;
  --neon-green: #39ff14;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Poppins", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ===== CHAPTER VISUAL THEMES ===== */
body[class*="chapter-"] {
  --chapter-a: var(--dart-blue);
  --chapter-b: var(--dart-light-blue);
  --chapter-c: var(--dart-teal);
  --chapter-soft: rgba(1, 117, 194, 0.14);
  --chapter-card-radius: 20px;
  --chapter-icon-radius: 16px;
  --chapter-tilt: 0deg;
  --chapter-bg-pattern: radial-gradient(circle at 20% 15%, var(--chapter-soft), transparent 22rem);
  --chapter-card-gradient: linear-gradient(135deg, var(--chapter-a), var(--chapter-b));
}

.chapter-1 { --chapter-a: #13b9fd; --chapter-b: #1de9b6; --chapter-c: #0175c2; --chapter-soft: rgba(19, 185, 253, 0.17); }
.chapter-2 { --chapter-a: #ff006e; --chapter-b: #ffbd2e; --chapter-c: #8338ec; --chapter-soft: rgba(255, 0, 110, 0.15); }
.chapter-3 { --chapter-a: #8b5cf6; --chapter-b: #22d3ee; --chapter-c: #f472b6; --chapter-soft: rgba(139, 92, 246, 0.16); }
.chapter-4 { --chapter-a: #f97316; --chapter-b: #facc15; --chapter-c: #38bdf8; --chapter-soft: rgba(249, 115, 22, 0.16); }
.chapter-5 { --chapter-a: #22c55e; --chapter-b: #14b8a6; --chapter-c: #eab308; --chapter-soft: rgba(34, 197, 94, 0.16); }
.chapter-6 { --chapter-a: #ec4899; --chapter-b: #a855f7; --chapter-c: #38bdf8; --chapter-soft: rgba(236, 72, 153, 0.16); }
.chapter-7 { --chapter-a: #06b6d4; --chapter-b: #3b82f6; --chapter-c: #a3e635; --chapter-soft: rgba(6, 182, 212, 0.16); }
.chapter-8 { --chapter-a: #10b981; --chapter-b: #84cc16; --chapter-c: #f59e0b; --chapter-soft: rgba(16, 185, 129, 0.16); }
.chapter-9 { --chapter-a: #f43f5e; --chapter-b: #fb7185; --chapter-c: #38bdf8; --chapter-soft: rgba(244, 63, 94, 0.15); }
.chapter-10 { --chapter-a: #6366f1; --chapter-b: #06b6d4; --chapter-c: #f0abfc; --chapter-soft: rgba(99, 102, 241, 0.16); }
.chapter-11 { --chapter-a: #0ea5e9; --chapter-b: #2dd4bf; --chapter-c: #f472b6; --chapter-soft: rgba(45, 212, 191, 0.15); }
.chapter-12 { --chapter-a: #eab308; --chapter-b: #fb923c; --chapter-c: #38bdf8; --chapter-soft: rgba(234, 179, 8, 0.16); }
.chapter-13 { --chapter-a: #a855f7; --chapter-b: #ec4899; --chapter-c: #22d3ee; --chapter-soft: rgba(168, 85, 247, 0.16); }
.chapter-14 { --chapter-a: #14b8a6; --chapter-b: #0ea5e9; --chapter-c: #facc15; --chapter-soft: rgba(20, 184, 166, 0.16); }
.chapter-15 { --chapter-a: #f97316; --chapter-b: #ef4444; --chapter-c: #fde047; --chapter-soft: rgba(239, 68, 68, 0.15); }
.chapter-16 { --chapter-a: #22d3ee; --chapter-b: #8b5cf6; --chapter-c: #f472b6; --chapter-soft: rgba(34, 211, 238, 0.15); }

.chapter-shape-1 {
  --chapter-card-radius: 18px;
  --chapter-icon-radius: 16px;
  --chapter-bg-pattern:
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
}

.chapter-shape-2 {
  --chapter-card-radius: 30px 10px 30px 10px;
  --chapter-icon-radius: 999px;
  --chapter-tilt: -1deg;
  --chapter-bg-pattern:
    radial-gradient(circle at 18% 25%, var(--chapter-soft), transparent 18rem),
    radial-gradient(circle at 78% 10%, rgba(255,255,255,0.06), transparent 12rem);
}

.chapter-shape-3 {
  --chapter-card-radius: 12px;
  --chapter-icon-radius: 8px;
  --chapter-tilt: 1deg;
  --chapter-bg-pattern:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 22px);
}

.chapter-shape-4 {
  --chapter-card-radius: 24px;
  --chapter-icon-radius: 24px 8px;
  --chapter-bg-pattern:
    radial-gradient(circle at 25% 25%, var(--chapter-soft), transparent 15rem),
    conic-gradient(from 180deg at 80% 20%, rgba(255,255,255,0.08), transparent 32%, rgba(255,255,255,0.04), transparent 68%);
}

/* ===== FLOATING ICONS BACKGROUND ===== */
.floating-icons {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.float-icon {
  position: absolute;
  width: 60px;
  height: 60px;
  opacity: 0.06;
  animation: floatAnimation 8s ease-in-out infinite;
  filter: blur(0.5px);
}

@keyframes floatAnimation {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-20px) rotate(5deg);
  }
  50% {
    transform: translateY(-10px) rotate(-5deg);
  }
  75% {
    transform: translateY(-25px) rotate(3deg);
  }
}

/* ===== LANDING PAGE ===== */
.landing-page {
  min-height: 100vh;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg-gradient);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.landing-page::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    var(--chapter-bg-pattern),
    radial-gradient(circle at 82% 78%, color-mix(in srgb, var(--chapter-b), transparent 82%), transparent 24rem);
  background-size: 64px 64px, auto, auto;
  opacity: 0.9;
  pointer-events: none;
}

.landing-page::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  right: clamp(-130px, -6vw, -60px);
  top: 15%;
  border: 1px solid color-mix(in srgb, var(--chapter-b), transparent 55%);
  border-radius: var(--chapter-card-radius);
  transform: rotate(18deg);
  opacity: 0.16;
  pointer-events: none;
  animation: themeDrift 12s ease-in-out infinite alternate;
}

@keyframes themeDrift {
  from { transform: rotate(12deg) translateY(0); }
  to { transform: rotate(28deg) translateY(34px); }
}

.landing-page.active {
  display: flex;
}

.landing-container {
  max-width: 1200px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

/* ===== HERO SECTION ===== */
.hero-section {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.main-icon-container {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.main-dart-icon {
  width: 110px;
  height: 110px;
  filter: drop-shadow(0 0 35px color-mix(in srgb, var(--chapter-a), transparent 38%));
  animation: pulse 3s ease-in-out infinite;
}

.icon-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 170px;
  height: 170px;
  background: radial-gradient(
    circle,
    var(--chapter-soft) 0%,
    transparent 70%
  );
  border-radius: 50%;
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.06);
  }
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.95;
    transform: translate(-50%, -50%) scale(1.2);
  }
}

.title {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.8rem;
}

.title-line {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--chapter-b);
  letter-spacing: 5px;
  text-transform: uppercase;
}

.title-main {
  font-size: 3.2rem;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    var(--chapter-a) 0%,
    var(--chapter-b) 50%,
    var(--chapter-c) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.25;
}

.title-sub {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== LEARNING OBJECTIVES ===== */
.learning-objectives {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 1.5rem;
  border: 1px solid var(--card-border);
  border-radius: var(--chapter-card-radius);
  background:
    linear-gradient(135deg, var(--chapter-soft), transparent 65%),
    rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s backwards;
}

.learning-objectives h2 {
  font-size: 1.3rem;
  margin: 0 0 1.2rem;
  color: var(--chapter-b);
  text-align: center;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.objective-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.objective-grid article {
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--chapter-card-radius);
  background: rgba(255, 255, 255, 0.02);
  text-align: left;
  transition: all 0.3s ease;
}

.objective-grid article:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: color-mix(in srgb, var(--chapter-b), transparent 58%);
  transform: translateY(-4px) rotate(var(--chapter-tilt));
}

.objective-grid strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.objective-grid span {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ===== TOPICS GRID ===== */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s backwards;
}

.topic-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--chapter-card-radius);
  padding: 1.8rem 1.5rem;
  position: relative;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
  text-align: left;
}

.topic-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--chapter-soft) 0%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
}

.topic-card:hover {
  transform: translateY(-8px) rotate(var(--chapter-tilt));
  border-color: var(--chapter-b);
  box-shadow: 0 0 45px color-mix(in srgb, var(--chapter-a), transparent 68%);
}

.topic-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(
    135deg,
    var(--chapter-a) 0%,
    var(--chapter-b) 100%
  );
  border-radius: var(--chapter-icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  color: white;
  box-shadow: 0 8px 24px color-mix(in srgb, var(--chapter-a), transparent 72%);
  transition: transform 0.4s ease;
}

.topic-card:hover .card-icon {
  transform: scale(1.08) rotate(3deg);
}

.topic-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.topic-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.card-number {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  font-size: 2.2rem;
  font-weight: 800;
  color: color-mix(in srgb, var(--chapter-b), transparent 84%);
  line-height: 1;
}

/* ===== START BUTTON ===== */
.start-btn-container {
  margin-top: 1rem;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s backwards;
}

.start-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.9rem 2.2rem;
  background: linear-gradient(
    135deg,
    var(--chapter-a) 0%,
    var(--chapter-b) 100%
  );
  border: none;
  border-radius: 50px;
  color: white;
  font-family: "Poppins", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 32px color-mix(in srgb, var(--chapter-a), transparent 65%);
}

.start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px color-mix(in srgb, var(--chapter-b), transparent 58%);
}

.start-btn i {
  transition: transform 0.3s ease;
}

.start-btn:hover i {
  transform: translateX(4px);
}

/* ===== SLIDES SECTION ===== */
.slides-section {
  display: none;
  min-height: 100vh;
  flex-direction: column;
  background: var(--bg-gradient);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.slides-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    var(--chapter-bg-pattern),
    radial-gradient(circle at 10% 80%, var(--chapter-soft), transparent 20rem),
    radial-gradient(circle at 92% 12%, color-mix(in srgb, var(--chapter-b), transparent 86%), transparent 18rem);
  background-size: 72px 72px, auto, auto;
  opacity: 0.75;
  pointer-events: none;
}

.slides-section.active {
  display: flex;
}

/* ===== SLIDE HEADER ===== */
.slide-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.9rem 2rem;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--chapter-a), transparent 88%), rgba(0, 0, 0, 0.35)),
    rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}

.home-btn {
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.home-btn:hover {
  background: var(--chapter-card-gradient);
  border-color: var(--chapter-b);
  transform: translateY(-1px);
}

.progress-container {
  flex: 1;
  height: 7px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--chapter-a) 0%,
    var(--chapter-b) 100%
  );
  border-radius: 10px;
  transition: width 0.35s ease;
}

.slide-counter {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 55px;
  text-align: right;
  letter-spacing: 0.5px;
}

/* ===== SLIDES WRAPPER ===== */
.slides-wrapper {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  opacity: 0;
  padding: 2.2rem 3rem;
  overflow-y: auto;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1;
}

.slide.active {
  display: block;
  opacity: 1;
}

/* ===== SLIDE CONTENT ===== */
.slide-content {
  max-width: 950px;
  margin: 0 auto;
  animation: slideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.slide-content::before {
  content: "";
  position: fixed;
  width: 190px;
  height: 190px;
  left: clamp(12px, 7vw, 110px);
  bottom: clamp(70px, 12vh, 130px);
  border: 1px solid color-mix(in srgb, var(--chapter-c), transparent 62%);
  border-radius: var(--chapter-card-radius);
  transform: rotate(-14deg);
  opacity: 0.13;
  pointer-events: none;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-header-content {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1rem;
}

.slide-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(
    135deg,
    var(--chapter-a) 0%,
    var(--chapter-b) 100%
  );
  border-radius: var(--chapter-icon-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: white;
  box-shadow: 0 8px 24px color-mix(in srgb, var(--chapter-a), transparent 72%);
}

.slide-title-group {
  flex: 1;
}

.slide-category {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--chapter-b);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.2rem;
}

.slide-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

/* ===== CODE BLOCKS ===== */
.code-block {
  background: #151821;
  border-radius: 16px;
  margin: 1.25rem 0;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.2rem;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.code-dots {
  display: flex;
  gap: 7px;
}

.code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dots span:nth-child(1) { background: #ff5f56; }
.code-dots span:nth-child(2) { background: #ffbd2e; }
.code-dots span:nth-child(3) { background: #27ca40; }

.code-lang {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 1px;
}

.code-content {
  padding: 1.2rem;
  overflow-x: auto;
}

.code-content pre {
  margin: 0;
  font-family: "Fira Code", "JetBrains Mono", "Consolas", monospace;
  font-size: 0.86rem;
  line-height: 1.65;
  color: #e3e6ed;
}

/* Code syntax highlighting classes (both custom and Prism-friendly) */
.comment, .token.comment { color: #6a9955; font-style: italic; }
.keyword, .token.keyword { color: #c586c0; font-weight: 600; }
.type, .token.class-name { color: #4ec9b0; }
.function, .token.function { color: #dcdcaa; }
.string, .token.string { color: #ce9178; }
.number, .token.number { color: #b5cea8; }
.variable, .token.variable { color: #9cdcfe; }
.operator, .token.operator { color: #d4d4d4; }
.boolean, .token.boolean { color: #569cd6; font-weight: 600; }
.class, .token.class { color: #4ec9b0; }

/* ===== INFO BOXES ===== */
.info-box {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
  position: relative;
  overflow: hidden;
}

.info-box::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--dart-blue) 0%, var(--dart-light-blue) 100%);
}

.info-box.tip::before {
  background: linear-gradient(180deg, #27ca40 0%, #1de9b6 100%);
}

.info-box.warning::before {
  background: linear-gradient(180deg, #ffbd2e 0%, #ff9500 100%);
}

.info-box.danger::before {
  background: linear-gradient(180deg, #ff5f56 0%, #e81123 100%);
}

.info-box-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dart-light-blue);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-box.tip .info-box-title { color: #27ca40; }
.info-box.warning .info-box-title { color: #ffbd2e; }
.info-box.danger .info-box-title { color: #ff5f56; }

.info-box p, .info-box ul {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.info-box ul {
  padding-left: 1.25rem;
}

.info-box li {
  margin-bottom: 0.4rem;
}

.founder-grid {
  align-items: stretch;
}

.founder-card {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 0.9rem 1rem;
  align-items: center;
}

.founder-card p {
  grid-column: 1 / -1;
  margin-top: 0.15rem;
}

.founder-photo {
  width: 92px;
  height: 92px;
  border-radius: 14px;
  object-fit: cover;
  border: 1px solid rgba(19, 185, 253, 0.35);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
}

.founder-meta .info-box-title {
  margin-bottom: 0.35rem;
}

.founder-meta span {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

@media (max-width: 520px) {
  .founder-card {
    grid-template-columns: 76px 1fr;
    gap: 0.75rem;
  }

  .founder-photo {
    width: 76px;
    height: 76px;
    border-radius: 12px;
  }
}

/* ===== TEXT CONTENT ===== */
.text-content {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 1.25rem 0;
}

.text-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.highlight {
  color: var(--dart-light-blue);
  font-weight: 600;
}

/* ===== FEATURE LIST ===== */
.feature-list {
  display: grid;
  gap: 0.9rem;
  margin: 1.25rem 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1rem 1.2rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-item:hover {
  border-color: var(--dart-blue);
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.05);
}

.feature-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--dart-blue) 0%, var(--dart-light-blue) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.feature-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ===== DIAGRAM BOX ===== */
.diagram-box {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
  margin: 1.25rem 0;
  text-align: center;
}

.diagram-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dart-light-blue);
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
}

.diagram-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.diagram-node {
  min-width: 9rem;
  max-width: min(100%, 15rem);
  min-height: 2.5rem;
  padding: 0.65rem 1rem;
  background: linear-gradient(
    135deg,
    var(--dart-blue) 0%,
    var(--dart-light-blue) 100%
  );
  border-radius: 10px;
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  line-height: 1.25;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow-wrap: anywhere;
  text-wrap: balance;
  box-shadow: 0 4px 15px rgba(1, 117, 194, 0.25);
}

.diagram-node.secondary {
  background: linear-gradient(135deg, #ff006e 0%, #8338ec 100%);
  box-shadow: 0 4px 15px rgba(131, 56, 236, 0.25);
}

.diagram-arrow {
  color: var(--dart-light-blue);
  font-size: 1.25rem;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table {
  width: 100%;
  margin: 1.25rem 0;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--card-border);
}

.comparison-table th, .comparison-table td {
  padding: 0.9rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

.comparison-table th {
  background: rgba(1, 117, 194, 0.15);
  font-weight: 600;
  color: var(--dart-light-blue);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.comparison-table td {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* ===== TWO COLUMN LAYOUT ===== */
.two-column {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 1.25rem 0;
}

@media (max-width: 768px) {
  .two-column {
    grid-template-columns: 1fr;
  }
}

/* ===== STEP LIST ===== */
.step-list {
  margin: 1.25rem 0;
}

.step-item {
  display: flex;
  gap: 0.9rem;
  margin-bottom: 1.25rem;
  position: relative;
}

.step-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 44px;
  width: 2px;
  height: calc(100% - 15px);
  background: linear-gradient(180deg, var(--dart-blue), transparent);
}

.step-number {
  width: 40px;
  height: 40px;
  background: linear-gradient(
    135deg,
    var(--dart-blue) 0%,
    var(--dart-light-blue) 100%
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.step-content {
  padding-top: 0.3rem;
}

.step-content h4 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.step-content p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== RESULT BOX / OUTPUT ===== */
.result-box {
  background: linear-gradient(
    135deg,
    rgba(39, 202, 64, 0.08) 0%,
    rgba(29, 233, 182, 0.08) 100%
  );
  border: 1px solid rgba(39, 202, 64, 0.25);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}

.result-box .result-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: #27ca40;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-box .result-content {
  font-family: "Fira Code", "JetBrains Mono", monospace;
  font-size: 0.84rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.5;
}

/* ===== SLIDE NAVIGATION ===== */
.slide-navigation {
  display: flex;
  justify-content: space-between;
  padding: 0.9rem 2rem;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--card-border);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: "Poppins", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-btn:hover:not(:disabled) {
  background: var(--dart-blue);
  border-color: var(--dart-blue);
  transform: translateY(-1.5px);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.next-btn {
  background: linear-gradient(
    135deg,
    var(--dart-blue) 0%,
    var(--dart-light-blue) 100%
  );
  border: none;
  box-shadow: 0 4px 15px rgba(1, 117, 194, 0.2);
}

.next-btn:hover:not(:disabled) {
  box-shadow: 0 6px 20px rgba(1, 117, 194, 0.3);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--dart-blue);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--dart-light-blue);
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 900px) {
  .objective-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .title-main {
    font-size: 2.3rem;
  }

  .title-sub {
    font-size: 1.25rem;
  }

  .topics-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

  .slide {
    padding: 1.5rem 1.25rem;
  }

  .slide-title {
    font-size: 1.45rem;
  }

  .slide-navigation {
    padding: 0.8rem 1.25rem;
  }

  .nav-btn span {
    display: none;
  }

  .diagram-flow {
    flex-direction: column;
  }

  .diagram-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 560px) {
  .objective-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 3D DART LOGO & ORBITING RINGS ===== */
.logo-3d-container {
  width: 150px;
  height: 150px;
  perspective: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2.5rem;
  animation: levitate 4s ease-in-out infinite;
}

.logo-3d-scene {
  width: 120px;
  height: 120px;
  transform-style: preserve-3d;
  position: relative;
}

.logo-3d-card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: spin3d 12s linear infinite;
  cursor: pointer;
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.logo-3d-card:hover {
  animation-play-state: paused;
  transform: rotateY(180deg) rotateX(15deg) scale(1.1);
}

@keyframes spin3d {
  0% { transform: rotateY(0deg) rotateX(6deg); }
  50% { transform: rotateY(180deg) rotateX(-6deg); }
  100% { transform: rotateY(360deg) rotateX(6deg); }
}

@keyframes levitate {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.logo-3d-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-3d-face img {
  width: 105px;
  height: 105px;
  filter: drop-shadow(0 0 25px rgba(19, 185, 253, 0.8));
}

.face-front {
  transform: translateZ(8px);
}

.face-back {
  transform: rotateY(180deg) translateZ(8px);
}

/* Orbiting Rings in 3D Space */
.logo-3d-ring {
  position: absolute;
  top: -15px;
  left: -15px;
  width: 150px;
  height: 150px;
  border: 2px dashed var(--neon-cyan);
  border-radius: 50%;
  transform: rotateX(80deg) translateZ(0px);
  filter: drop-shadow(0 0 10px var(--neon-cyan));
  opacity: 0.55;
  pointer-events: none;
  animation: spin-ring-horiz 20s linear infinite;
}

.logo-3d-ring.ring-vertical {
  border: 1.5px solid var(--neon-purple);
  transform: rotateY(85deg) translateZ(0px);
  filter: drop-shadow(0 0 10px var(--neon-purple));
  opacity: 0.45;
  animation: spin-ring-vert 16s linear infinite reverse;
}

@keyframes spin-ring-horiz {
  from { transform: rotateX(80deg) rotateZ(0deg); }
  to { transform: rotateX(80deg) rotateZ(360deg); }
}

@keyframes spin-ring-vert {
  from { transform: rotateY(85deg) rotateZ(0deg); }
  to { transform: rotateY(85deg) rotateZ(360deg); }
}

/* ===== SLIDE PLAYER BACKGROUND DECORATIONS ===== */
.slides-bg-decorations {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* Glowing blobs */
.decor-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  animation: morphBlob 15s ease-in-out infinite alternate;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--dart-blue) 0%, transparent 70%);
}

.blob-2 {
  bottom: -15%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  animation-delay: -5s;
}

@keyframes morphBlob {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
    border-radius: 50%;
  }
  33% {
    transform: translate(30px, -40px) scale(1.1) rotate(120deg);
    border-radius: 40% 60% 70% 30% / 50% 60% 40% 50%;
  }
  66% {
    transform: translate(-20px, 20px) scale(0.95) rotate(240deg);
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  100% {
    transform: translate(0, 0) scale(1) rotate(360deg);
    border-radius: 50%;
  }
}

/* Pulsing Neon Particles */
.decor-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  opacity: 0.3;
  animation: pulseParticle 4s ease-in-out infinite alternate;
}

.p-1 {
  top: 25%;
  left: 15%;
  background-color: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan);
  animation-duration: 3s;
}

.p-2 {
  top: 70%;
  left: 25%;
  background-color: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green);
  animation-duration: 5s;
  animation-delay: -1s;
}

.p-3 {
  top: 40%;
  right: 18%;
  background-color: var(--accent-pink);
  box-shadow: 0 0 10px var(--accent-pink);
  animation-duration: 4s;
  animation-delay: -2s;
}

@keyframes pulseParticle {
  0% { transform: scale(1); opacity: 0.2; }
  100% { transform: scale(2); opacity: 0.6; }
}

/* Floating Dart Background Icons */
.decor-icon {
  position: absolute;
  width: 45px;
  height: 45px;
  opacity: 0.04;
  pointer-events: none;
  filter: blur(0.3px);
  animation: floatDeco 12s ease-in-out infinite;
}

.icon-1 {
  top: 15%;
  right: 25%;
  animation-delay: 0s;
  animation-duration: 12s;
}

.icon-2 {
  bottom: 25%;
  left: 10%;
  animation-delay: -3s;
  animation-duration: 15s;
}

.icon-3 {
  bottom: 12%;
  right: 15%;
  animation-delay: -6s;
  animation-duration: 10s;
}

@keyframes floatDeco {
  0% {
    transform: translateY(0) rotate(0deg) scale(1);
  }
  50% {
    transform: translateY(-25px) rotate(180deg) scale(1.1);
  }
  100% {
    transform: translateY(0) rotate(360deg) scale(1);
  }
}

/* ===== 3D SLIDE CARDS & STAGGERED ENTRANCES ===== */
.slides-wrapper {
  perspective: 1200px;
  transform-style: preserve-3d;
}

.slide.active {
  display: block;
  opacity: 1;
  transform-style: preserve-3d;
  animation: slideEntrance 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideEntrance {
  0% {
    opacity: 0;
    transform: translateZ(-100px) rotateX(15deg) translateY(50px);
    filter: blur(12px);
  }
  100% {
    opacity: 1;
    transform: translateZ(0) rotateX(0) translateY(0);
    filter: blur(0);
  }
}

.chapter-motion-1 .slide.active {
  animation-name: slideEntrance;
}

.chapter-motion-2 .slide.active {
  animation-name: slideEntranceOrbit;
}

.chapter-motion-3 .slide.active {
  animation-name: slideEntranceRibbon;
}

.chapter-motion-4 .slide.active {
  animation-name: slideEntrancePop;
}

.chapter-motion-5 .slide.active {
  animation-name: slideEntrancePanel;
}

@keyframes slideEntranceOrbit {
  0% {
    opacity: 0;
    transform: translateX(70px) rotateY(-18deg) scale(0.96);
    filter: blur(10px);
  }
  100% {
    opacity: 1;
    transform: translateX(0) rotateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes slideEntranceRibbon {
  0% {
    opacity: 0;
    transform: translateY(-46px) skewY(-2deg);
    clip-path: inset(0 0 100% 0 round 24px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) skewY(0);
    clip-path: inset(0 0 0 0 round 0);
  }
}

@keyframes slideEntrancePop {
  0% {
    opacity: 0;
    transform: scale(0.9) translateY(28px);
    filter: saturate(0.5) blur(8px);
  }
  70% {
    transform: scale(1.015) translateY(0);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
    filter: saturate(1) blur(0);
  }
}

@keyframes slideEntrancePanel {
  0% {
    opacity: 0;
    transform: translateZ(-80px) rotateZ(-1.8deg) translateY(38px);
    filter: blur(9px);
  }
  100% {
    opacity: 1;
    transform: translateZ(0) rotateZ(0) translateY(0);
    filter: blur(0);
  }
}

/* Staggered build animations inside active slide */
.slide.active .slide-header-content {
  animation: elementEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.slide.active .text-content,
.slide.active .info-box,
.slide.active .code-block,
.slide.active .topics-grid,
.slide.active .comparison-table,
.slide.active .two-column,
.slide.active .step-list,
.slide.active .diagram-box,
.slide.active .feature-list,
.slide.active .result-box {
  animation: elementEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

@keyframes elementEntrance {
  0% {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== INTERACTIVE HOVER & NEON GLOWS ===== */
/* Code Blocks Hover */
.code-block {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.code-block:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--chapter-b), transparent 58%);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px color-mix(in srgb, var(--chapter-a), transparent 84%);
}

/* Code Copy Button */
.copy-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  color: var(--text-secondary);
  font-family: "Poppins", sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.copy-btn:hover {
  background: color-mix(in srgb, var(--chapter-a), transparent 75%);
  border-color: var(--chapter-b);
  color: white;
  box-shadow: 0 0 10px color-mix(in srgb, var(--chapter-b), transparent 70%);
}

.copy-btn.copied {
  background: rgba(39, 202, 64, 0.2);
  border-color: #27ca40;
  color: #1de9b6;
}

/* Info Boxes Hover */
.info-box {
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.info-box:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.info-box.tip:hover {
  border-color: rgba(39, 202, 64, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(39, 202, 64, 0.08);
}

.info-box.warning:hover {
  border-color: rgba(255, 189, 46, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 189, 46, 0.08);
}

.info-box.danger:hover {
  border-color: rgba(255, 95, 86, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 95, 86, 0.08);
}

/* Step items line glow & hover */
.step-item {
  transition: transform 0.3s ease;
}

.step-item:hover {
  transform: translateX(6px);
}

.step-item:hover .step-number {
  animation: pulseStep 1.5s infinite alternate;
}

@keyframes pulseStep {
  0% {
    box-shadow: 0 0 10px rgba(1, 117, 194, 0.4);
    transform: scale(1);
  }
  100% {
    box-shadow: 0 0 20px rgba(19, 185, 253, 0.8);
    transform: scale(1.05);
  }
}

/* Result Box Glow */
.result-box {
  transition: all 0.4s ease;
}

.result-box:hover {
  transform: translateY(-2px);
  border-color: rgba(39, 202, 64, 0.5);
  box-shadow: 0 8px 25px rgba(39, 202, 64, 0.15);
}

/* Micro interaction for the home button */
.home-btn:hover i {
  animation: rotateHome 0.5s ease-in-out;
}

@keyframes rotateHome {
  0% { transform: rotate(0); }
  50% { transform: rotate(-15deg); }
  100% { transform: rotate(360deg); }
}

/* ===== MERMAID DIAGRAM STYLING ===== */
.mermaid {
  background: rgba(0, 0, 0, 0.2) !important;
  padding: 1rem;
  border-radius: 16px;
  border: 1px dashed rgba(255, 255, 255, 0.08);
  display: block;
  margin: 1.5rem 0;
  transition: all 0.3s ease;
  overflow-x: auto;
  overflow-y: visible !important;
  min-height: 80px;
  text-align: center;
}

.mermaid:hover {
  border-color: var(--dart-light-blue);
  box-shadow: 0 8px 24px rgba(1, 117, 194, 0.1);
  transform: translateY(-2px);
}

/* Biarkan Mermaid mengatur ukuran SVG-nya sendiri,
   kita hanya pastikan tidak meluber keluar kontainer */
.mermaid svg {
  display: block;
  margin: 0 auto;
  width: auto !important;
  max-width: 100% !important;
  max-height: 58vh;
  height: auto !important;
  overflow: visible !important;
}

.mermaid.mermaid-compact svg {
  width: min(760px, 100%) !important;
  max-height: 62vh;
}

.mermaid.mermaid-compact text,
.mermaid.mermaid-compact tspan,
.mermaid.mermaid-compact .label,
.mermaid.mermaid-compact .nodeLabel,
.mermaid.mermaid-compact .edgeLabel,
.mermaid.mermaid-compact .label foreignObject,
.mermaid.mermaid-compact .label foreignObject div,
.mermaid.mermaid-compact .label foreignObject span,
.mermaid.mermaid-compact .label foreignObject p {
  font-size: 11px !important;
  line-height: 1.15 !important;
  max-width: 110px !important;
  white-space: normal !important;
  overflow-wrap: break-word !important;
  text-align: center !important;
}

.mermaid svg g,
.mermaid svg text,
.mermaid svg foreignObject {
  overflow: visible !important;
}

/* Bab 10 ke atas punya diagram yang lebih padat, jadi font dan jaraknya
   diperkecil supaya label tidak gampang terpotong. */
.chapter-mermaid-compact .mermaid {
  padding: 0.9rem;
}

.chapter-mermaid-compact .mermaid text,
.chapter-mermaid-compact .mermaid tspan,
.chapter-mermaid-compact .mermaid .label,
.chapter-mermaid-compact .mermaid .nodeLabel,
.chapter-mermaid-compact .mermaid .edgeLabel,
.chapter-mermaid-compact .mermaid .label foreignObject,
.chapter-mermaid-compact .mermaid .label foreignObject div,
.chapter-mermaid-compact .mermaid .label foreignObject span,
.chapter-mermaid-compact .mermaid .label foreignObject p {
  font-size: 11px !important;
  line-height: 1.2 !important;
}

.chapter-mermaid-compact .mermaid .node rect,
.chapter-mermaid-compact .mermaid .node circle,
.chapter-mermaid-compact .mermaid .node polygon,
.chapter-mermaid-compact .mermaid .node path {
  rx: 5px;
  ry: 5px;
}

@media (max-width: 768px) {
  .mermaid {
    padding: 0.75rem;
    margin: 1rem 0;
  }

  .mermaid text,
  .mermaid tspan,
  .mermaid .label,
  .mermaid .nodeLabel,
  .mermaid .edgeLabel,
  .mermaid .label foreignObject,
  .mermaid .label foreignObject div,
  .mermaid .label foreignObject span,
  .mermaid .label foreignObject p {
    font-size: 10px !important;
    line-height: 1.2 !important;
  }

  .chapter-mermaid-compact .mermaid {
    padding: 0.65rem;
  }

  .chapter-mermaid-compact .mermaid text,
  .chapter-mermaid-compact .mermaid tspan,
  .chapter-mermaid-compact .mermaid .label,
  .chapter-mermaid-compact .mermaid .nodeLabel,
  .chapter-mermaid-compact .mermaid .edgeLabel,
  .chapter-mermaid-compact .mermaid .label foreignObject,
  .chapter-mermaid-compact .mermaid .label foreignObject div,
  .chapter-mermaid-compact .mermaid .label foreignObject span,
  .chapter-mermaid-compact .mermaid .label foreignObject p {
    font-size: 10px !important;
  }
}

/* Custom styling untuk shape node (warna border saja, BUKAN font) */
.mermaid .node rect,
.mermaid .node circle,
.mermaid .node polygon,
.mermaid .node path {
  stroke: var(--dart-light-blue) !important;
  stroke-width: 1.5px !important;
  transition: all 0.3s ease;
}

.mermaid .node:hover rect,
.mermaid .node:hover circle,
.mermaid .node:hover polygon,
.mermaid .node:hover path {
  fill: rgba(1, 117, 194, 0.25) !important;
  stroke: var(--neon-cyan) !important;
  filter: drop-shadow(0 0 8px var(--neon-cyan));
}

.mermaid .edgePath .path {
  stroke: var(--dart-teal) !important;
  stroke-width: 1.5px !important;
}

.mermaid .edgePath .arrowhead {
  fill: var(--dart-teal) !important;
}